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Why Does the Battery Leak?

Published in Battery Maintenance 2 mins read

A battery leaks primarily due to gas buildup and subsequent pressure within the battery cell. Here's a breakdown of the reasons:

Understanding Battery Leakage

Battery leakage, also known as battery acid leakage, occurs when the chemicals inside a battery escape. This is usually a sign that something is wrong with the battery's internal structure.

The Main Reason: Gas Formation

  • Gas Buildup: According to the reference, when a battery is left unused for an extended period, especially in a discharged state within a device, gas forms inside.
  • Pressure Increase: This gas increases the internal pressure within the battery.
  • Protective Layer Failure: To prevent a potential explosion, manufacturers design the battery with a protective layer that can break under excessive pressure. This is the source of the leak.

Summary

Reason Explanation
Gas Formation Occurs when a battery is left unused or discharged for too long.
Pressure Buildup The gas formation increases the internal pressure of the battery.
Protective Layer Breaks The battery's protective layer breaks under excessive pressure, causing the internal chemicals to leak out.

Avoiding Battery Leakage: Practical Tips

While some battery leakage is inevitable, here are a few tips to minimize the risk:

  • Remove Batteries: Remove batteries from devices that won't be used for extended periods.
  • Proper Storage: Store batteries in a cool, dry place.
  • Use Quality Batteries: Invest in reputable battery brands, as they often have better construction and sealing.
  • Check Expiry Dates: Use batteries before their expiration date.
  • Avoid Mixing Battery Types: Don't mix old and new batteries or different battery brands in the same device.

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